1906.] Allen, Mammals from Western Mexico. 223 



Rockport, 6 from San Antonio) are larger by 2 to 3 mm. in all of the 

 above measurements, with disproportionately heavier dentition, the 

 upper premolars in 6 adult males averaging in length on the alveolar 

 line 24.9 as against 22.7 in the 4 adult male Sinaloa skulls, or 2 mm. 

 more. A series of 5 adult Arizona skulls agree closely with the 

 Texas series in general size and in the heavy dentition, pm 2-4 having 

 a length of 24.8 mm. 



Although nearly all of the ten adult specimens (including one 

 obtained in December, 1896) were taken in winter (Jan. zo-March 

 5), they present a great range of color variation, four being in the 

 gray phase, three in the red, and the others are variously intermediate. 

 The gray specimens agree with the type, except that the soles of 

 the hind feet vary from intense black to slightly blackish, or merely 

 dusky as in the type. The pelage is short and coarse, quite different 

 from that of its northern allies. The red phase is much less red than 

 in Arizona specimens (Lynx ruff us bailcyi). 



The five young specimens are all in the soft, woolly first coat. 

 They are all dingy grayish brown above, except one which is slightly 

 reddish, with the dark spots and markings of the adult faintly indi- 

 cated; the ventral surface is whitish, blotched with blackish. 



"Known as the Mojoquan on the western slope of the Sierra 

 Madre and the lowlands along the Pacific coast of Mexico. A shy, 

 wandering species, widely distributed, and seldom encountered in 

 the daytime, except when it is searching for water in the varano or 

 dry season. Feeds principally on rabbits and other rodents, iguanas, 

 crabs, and frogs. An expert hunter, and a hard fighter when wounded 

 or at bay. Usually rests in high grass or thick bushes during daytime, 

 in warm weather, and in caves and hollow trees in winter. Females 

 have from three to five kittens." -J. H. B. 



24. Canis vigilis Mcrrijni. 



Nine specimens, vicinity of Escuinapa, Feb. 5, 18, March 4, April 

 5, May 31, June 9, 15, July 30, Sept. 4. Five males and 4 females; 

 one of the males is without measurements and another male (the 

 September specimen) is only about two-thirds grown. 



Collector's measurements: 3 males, total length, 1162, 1182, 1197; 

 head and body, 851, 845, 889; tail vertebra, 311, 337, 318; hind foot 

 without claws, 194, 181, 191 ; ear from notch, 114, 102, 102: 4 females, 

 total length, 1060, 1073, 1124, 1248; head and body, 749, 762, 800, 

 873; tail vertebrae, 311, 311, 324, 375; hind foot, 191, 181, 178, 181; 

 ear, 114, 105, 108, m. 



